“It will be one of the most important, impactful, transformational projects that Public Works has done in the history of our town,” Ball said. It amounts to enough water to fill an in-ground swimming pool being diverted into the river every second. Once completed, the tunnel, located about 100 feet underground and measuring 18 feet in diameter, will carry 26,000 gallons of stormwater per second away from the town’s streets and into the Patapsco, said Howard County Executive Calvin Ball. READ MORE: Man, 22, Charged With Murder In Deadly West Baltimore Shooting BALTIMORE (WJZ) - Howard County has secured funding to building a 5,000-foot tunnel under Ellicott City, a historic town on the banks of the Patapsco River beset by multiple severe floods, county officials said.Įllicott City, founded in the 18th century as a mill town and the site of the first terminus of the B&O Railroad outside the city, suffered two 1,000-year floods in 20, damaging dozens of businesses and killing three people.